Here’s  a cool Nexus 9 mockup of an Android tablet!  Maybe you are looking for such a mockup to frame and present your ui, this one may give you some choice.

Freebie mockup psd  created and released by Ben Johnson
License info: according to the author,  it maybe used for any of your projects.

Like this Nexus 9 mockup? You can download the  psd file here: Download for free